Fig. 3: Reversible switching of PhPs in the U-RB of α-MoO3.
From: Chemical switching of low-loss phonon polaritons in α-MoO3 by hydrogen intercalation
a Optical micrographs and s-SNOM amplitude images (990 cm−1) of original, intercalated, and recovered MoO3 flakes. Scale bar = 5 μm. b PhP dispersion data and fitting results (solid lines) along both [100] and [001] directions (dashed lines in a). The error bars represent the 95% confidence intervals. c Group velocities of PhPs extracted from the fitting results in b. d Comparison and fitting (solid lines) of extracted line traces.
